Multiple Choice Questions

1. Edwin Hubble used Einstein's theories to show that the fabric of the universe _____.(a) Is not flat, it is curved, either inwards or outwards. (b) Is uniform in all places and times. (c) Has a finite boundary. (d) Is not static, it must either be shrinking or expanding.

2. Which of the following is not one of the four fundamental forces of the universe?(a) The photoelectric force. (b) Gravity. (c) The nuclear-weak force. (d) The electromagnetic force.

3. Which of the following accurately describes the phenomenon of "quantum tunneling"?(a) Particles can sometimes "borrow" energy to move in ways impossible in classical physics. (b) High-energy waves can penetrate the fabric of space-time for very short periods of time. (c) Particles with high energy can vanish in one location, instantly appearing in another. (d) Some particles are linked together, no matter how much space separates them.

4. What is the result when a particle of matter and a particle of antimatter are brought into contact?(a) A black hole is formed. (b) A theoretically unlimited amount of energy is released. (c) A strange quark is formed. (d) Energy is released and both particles are destroyed.

5. In the 1800s, James Clerk Maxwell used a new mathematical framework to unite _____.(a) Magnetism and gravity. (b) Electricity and magnetism. (c) Magnetism and light. (d) Nuclear forces and gravity.

Short Answer Questions

1. Black holes are dense and massive cosmological bodies. What unique distinction do they have?

2. What characteristic of the string determines the properties of the particle it represents?

3. When the distance between two objects is doubled, what happens to the strength of the gravitational pull between them?